iommu/vt-d: Suppress compiler warnings

suppress compiler warnings:
drivers/iommu/intel-iommu.c: In function ‘device_to_iommu’:
drivers/iommu/intel-iommu.c:673: warning: ‘segment’ may be used uninitialized in this function
drivers/iommu/intel-iommu.c: In function ‘get_domain_for_dev.clone.3’:
drivers/iommu/intel-iommu.c:2217: warning: ‘bridge_bus’ may be used uninitialized in this function
drivers/iommu/intel-iommu.c:2217: warning: ‘bridge_devfn’ may be used uninitialized in this function

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index cc2d22243fc0..c03d4b44bb92 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -671,7 +671,7 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf
         struct intel_iommu *iommu;
         struct device *tmp;
         struct pci_dev *ptmp, *pdev = NULL;
-        u16 segment;
+        u16 segment = 0;
         int i;
 
         if (dev_is_pci(dev)) {
@@ -2213,7 +2213,8 @@ static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
         struct device_domain_info *info;
         struct pci_dev *dev_tmp = NULL;
         unsigned long flags;
-        u8 bus, devfn, bridge_bus, bridge_devfn;
+        u8 bus, devfn;
+        u8 bridge_bus = 0, bridge_devfn = 0;
 
         domain = find_domain(dev);
         if (domain)